Hollywood feigning shock over Harvey Weinstein’s sleazy reputation is all an act.

Scott Rosenberg, a screenwriter who’s worked closely with Weinstein’s company, alleges everyone was well aware of Weinstein’s male chauvinistic ways.

“Let’s be perfectly clear about one thing: Everybody [expletive] knew,” Rosenberg wrote in a Facebook post, which appears to have since been deleted.

While Rosenberg admits rape allegations surrounding Weinstein is new information, his “pattern of overly aggressive behavior that was rather dreadful” is not.

“We knew about the man’s hunger; his fervor; his appetite. There was nothing secret about this voracious rapacity; like a gluttonous ogre out of the Brothers Grimm. All couched in vague promises of potential movie roles. (And, it should be noted: there were many who actually succumbed to his bulky charms. Willingly. Which surely must have only impelled him to cast his fetid net even wider),” he wrote.

“But like I said: everybody f***ing knew.”

Rosenberg’s first two films– “Things to Do in Denver When You’re Dead” (1995) and “Beautiful Girls” (1996) – were distributed by Miramax, the company founded by Bob and Harvey Weinstein.

“They gave me my career,” Rosenberg admitted.

He went on to say rumors of Weinstein being a sleazeball have persistently swirled throughout the industry and even had discussions about it with anyone who would listen.

“Do you know how I am sure this is true? Because I was there. And I saw you. And I talked about it with you. You, the big producers; you, the big directors; you, the big agents; you, the big financiers,” he said.

“And you, the big rival studio chiefs; you, the big actors; you, the big actresses; you, the big models. You, the big journalists; you, the big screenwriters; you, the big rock stars; you, the big restaurateurs; you, the big politicians. I saw you. All of you.God help me, I was there with you.”

Rosenberg expressed remorse over staying quiet about Weinstein’s salacious behavior while the movie mogul continued to throw lavish parties — which he attended.

“I am eternally sorry. To all of the women that had to suffer this…I am eternally sorry. I’ve worked with Mira (Sorvino) and Rosanna (Arquette) and Lysette (Anthony). I’ve known Rose (McGowan) and Ashley (Judd) and Claire (Forlani) for years…Their courage only hangs a lantern on my shame. And I am eternally sorry to all those who suffered in silence all this time. And have chosen to remain silent today,” he wrote.

“So, yeah, I am sorry. Sorry and ashamed. Because, in the end, I was complicit. I didn’t say [expletive]. I didn’t do [expletive]. Harvey was nothing but wonderful to me. So I reaped the rewards and I kept my mouth shut. And for that, once again, I am sorry.”